\begin{diagram}{Parameters}{paramaters}
\begin{mysyntdiag}
\synt{formal\ parameter\ list}
\lit*( \begin{rep}[b] \synt{parameter\ declaration} \\ \lit* ; \end{rep} \lit*)
\end{mysyntdiag}
\begin{mysyntdiag}
\synt{parameter\ declaration}
\begin{stack}
\synt{value\ parameter} \\
\synt{variable\ parameter} \\
\synt{out\ parameter} \\
\synt{constant\ parameter} \\
\synt{out\ parameter} 
\end{stack}
\end{mysyntdiag}
\end{diagram}